Method and apparatus for transmitter geo-location in mobile platforms
First Claim
Patent Images
1. A method of estimating a transmitter position, the method comprising:
- receiving radio frequency (RF) signals by a plurality of antenna arrays, wherein each antenna array comprises multiple elements;
phase shifting the received RF signal at each element of the antenna array of the plurality of antenna arrays;
combining the phase shifted RF signals and transforming the combined phase shifted RF signals into baseband signals;
converting the baseband signals into digital baseband signals;
generating a model that includes a set of snapshots of the digital baseband signals for each antenna array in the plurality of antenna arrays;
gathering the generated models for each antenna array in the plurality of antenna arrays;
deriving maximum likelihood estimation (MLE) based on the gathered models; and
generating an estimated transmitter position based on the derived MLE.
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Abstract
Described herein are architectures, platforms and methods for implementing a direct estimation of a transmitter'"'"'s position based upon raw radio frequency (RF) signals that are received by a portable device. A mathematical operation such as a maximum-likelihood estimation (MLE) algorithm, which utilizes collected snapshots from the received raw RF signals as variables, is implemented to perform direct estimation.
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Citations
20 Claims
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1. A method of estimating a transmitter position, the method comprising:
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receiving radio frequency (RF) signals by a plurality of antenna arrays, wherein each antenna array comprises multiple elements; phase shifting the received RF signal at each element of the antenna array of the plurality of antenna arrays; combining the phase shifted RF signals and transforming the combined phase shifted RF signals into baseband signals; converting the baseband signals into digital baseband signals; generating a model that includes a set of snapshots of the digital baseband signals for each antenna array in the plurality of antenna arrays; gathering the generated models for each antenna array in the plurality of antenna arrays; deriving maximum likelihood estimation (MLE) based on the gathered models; and generating an estimated transmitter position based on the derived MLE. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device comprising:
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a plurality of antenna arrays configured to receive radio frequency (RF) signals, wherein each antenna array comprises multiple elements; a phase-shifter component configured to each element of the antenna array, the phase-shifter component is configured to shift phase of the received RF signal at each element of the antenna array; a first combiner component configured to combine the phase shifted RF signals; a converter component configured to transform the combined phase shifted RF signals into baseband signals; an analog to digital (A/D) converter component configured to convert the baseband signals into digital baseband signals; a second combiner component configured to generated a model that includes a set of snapshots of the digital baseband signals for each antenna array in the plurality of antenna arrays; a position estimator component configured to gather the generated models for each antenna array in the plurality of antenna arrays, the position estimator component performs a maximum likelihood estimation (MLE) operation on the gathered models of the plurality of antenna arrays to generate an estimated transmitter position. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A receiver circuit comprising:
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a plurality of antenna arrays with multiple elements on each antenna array and configured to receive radio frequency (RF) signals on each element; a phase-shifter component at each element of the antenna array, the phase-shifter component configured to shift phase of the received RF signal at each element of the antenna array; a first combiner component configured to combine the phase shifted RF signals from each element of the antenna array; a converter component configured to transform the combined phase shifted RF signals into baseband signals; an analog to digital (A/D) converter component configured to convert the baseband signals into digital baseband signals; a second combiner component configured to generate a model that includes a set of snapshots of the digital baseband signals for each antenna array in the plurality of antenna arrays; a position estimator component configured to gather the generated models for each antenna array in the plurality of antenna arrays, the position estimator component performs a maximum likelihood estimation (MLE) operation on the gathered generated models of the plurality of antenna arrays to generate an estimated transmitter position. - View Dependent Claims (17, 18, 19, 20)
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Specification